Chapter 9

Chapter 9 is titled - "Mind Controlled, Part 1".

Summary
After Spongebob learns about Plankton from Mr. Krabs he leaves the Krusty Krab for the day, but he doesn't know that Plankton is following him as he did unbeknownst to him the day before. Spongebob does his daily chores and when the night finally sets, Plankton infiltrates Spongebob's body as he is sleeping and places a Mind Control device on his brain.